It is good that every day we take care of what we say and even what we think. God is always present and only He knows our thoughts, so it is good that day after day we ask God that our thoughts be preserved.
If our eyes and thoughts are placed in the hands of God, then it is very difficult for them to deviate from the right way of the Lord, and this is because we put everything in the hands of God.
The Lord knoweth the thoughts of man, that they are vanity.
For the weak-minded man it is very easy to deviate from the right path that leads to God, and he tends to be easily deceived. That is why it is good that our minds, souls and spirit are subject in the Lord asking Him every day to help us so that our minds are strengthened and saved from all evil.