People find it hard to succeed in school or society if they haven't made a habit of keeping things in mind. Although they may have learned many things they weren't able to act according to what they have heard and learned and they couldn't bear their fruits.
For a proper Christian life, the habit of remembering is critical. No matter how big or small they seem, the Words of God should be kept in our hearts and our actions. Then, we can possess true faith. So, why does it seem so difficult for some people to keep things in their hearts?
The five reasons will be presented here, so it will be a good chance for you to determine what you lack and make a habit of bearing things in mind.


Affects of the Innate Natures Inherited from Parents or Ancestors

The heart of men is spiritually likened to a field or a vessel. Some people inherit dispositions of good soil or a good vessel at birth while others did not. One might say that some are born with a sand-like heart and others are born with a clay-like heart.
Like the weaker sand-like soil quality, those with sand-like hearts have a weaker level of concentration. Just as it is hard to put even a single stick in the desert's sand, they find it harder to put something in their minds and remember it. Though they say that they love the Lord and made up their minds, they have hearts that change in a second when they met with trials, afflictions, or something complicated. Then, how can they build up the habit of remembering?
Bearing something in mind is like putting something into the heart-vessel. Things in a shallow vessel pop out when the vessel is agitated even a little bit. A person with such a shallow vessel does everything on impulse without deep consideration. Such a person is not patient and considerate of the circumstances and others' situations. However, though they have a sand-like heart or a shallow heart-vessel, they can be changed when their vessels are mixed with spiritual water that is the Word of God.
If you diligently change your heart-field until the Word of God permeates the original heart, your soil or heart-vessel can be changed. Then, you will be able to bear things in your heart with the help of the Holy Spirit.


Resulting from Deficiencies of the Body

In order to bear something in mind, we should be able to plant things in our hearts and put them into practice. The capability should be gained and acquired through training and education in both school and home. However, some people lacked the ability and for them it became a deficiency of the body. Such people do everything impulsively and thoughtlessly. How can we remove such deficiencies of the body and keep things well in our hearts?
We should try to plant things in our hearts by recalling them repeatedly. Here, 'feeling' plays a very significant role. This is because the degree of how deep something is planted in the heart differs depending on with what kind of feeling and how strongly we input the information in the mind and heart. For example, if you offer up the worship service in the inspiration of the Holy Spirit, you can discover yourself and receive realization through the Word preached. The message is planted in your hearts with strong feeling.
Also, some people lay aside what they have to do, or others do not finish something though they started it. Such people have a deficiency in putting what they learn into practice. People who fall under this type of deficiency need to make their own efforts such as taking notes of what they have to remember. They must put the notes in a place where they are easily spotted and practice them (Deuteronomy 6:6-9).


The Affect of Having Fleshly Thoughts

Fleshly thoughts arise from untruthful hearts. People usually think in accordance with their own standard or in their standpoints, so they may let others' ideas slip away although they say yes with lips when they hear something different from their ideas.
Some people cannot bear the Word of God in their hearts because they pursue the untruth thinking it is not a big deal, seek their own benefits, or justify themselves in fleshly thoughts with selfish-motives, greed, and lust.
Therefore, you must block fleshly thoughts first and cast away the untruthful attributes in your hearts quickly to bear things in your hearts well. Additionally, 'trust relations' plays an important role in remembering. If you really trust someone, his/her words will be planted deep in your hearts and you will be able to act according to them.


Not Completely Giving All Your Heart

To give all your heart means that you give love and dedication to something with deep interest in it. Suppose you are talking to someone. But you do not pay attention to what he is talking about but just eavesdrop on the conversation of people at the table next to yours. Then, you cannot keep his words in your heart.
If your beloved one likes apples, you think of him and desire to buy apples for him whenever you see apples. To the degree you have given your heart for him you can keep it in your mind that he likes apples.
What about those who love God? When people lead their Christian lives with all their hearts in the fervor of the first love, they only think about what the will of God is and what God wants and all their attention is paid to only God. If your love cools down it shows that you have something in your heart other than God.
Such people are concerned about other things, so they sometimes lose concentration and fail to keep something in mind. In that case, they must bear those things in mind again after they recover the first love, and then again they can give the love, devotion, and their hearts with attention to them.


Lack of Unity of Heart

If we are united as one with someone, we will obey him in accordance with his heart and will with joy and thanks. The same applies to our relation with God. For example, if we keep His Word in our hearts that we need to pray habitually, on bended knees, fervently, and with love and faith you will put the Word into practice.
If you remember something in the unity of one heart with God you don't have to remember it in your conscious thought, but you just cultivate the Word in your heart and practice it naturally.
No matter how many times God tells us not to sin, if one is not united with God he cannot help but to commit sins. However, if we cultivate His Word in our heart and come to have the heart of spirit, our hearts and eyes will remain where God's heart and eyes stay. So, it will be natural for us to keep His Word.