Rather,[this] thing is very close to you; it is in your mouth and in your heart, so that you can fulfill it.'' [Nitzavim 30:14]
At first glance, the statement that ''this thing is very near to you... in your heart'' appears to be contrary to our experience [and yet the Torah is eternally relevant], that it is simply not a ''very near thing'' to transform one's heart's desires from wanting worldly pleasures to a sincere love of God.
However, the words ''so that you can fulfill it'' at the end of the verse, qualify what is written at the beginning of the verse - that we are speaking here merely of a love which is sufficient to bring about the practical observance of the commandments....even if it is not palpable in his heart, like a burning fire.
And this is indeed ''very near'' and easy for any person who has a brain inside his skull, since a person's mind is under his control, and he is free to think about whatever he pleases, on any subject. So when he will use it to think about the greatness of God, he will inevitably generate - in his mind, at least - a love of God [sufficient to make a person want] to cleave to Him though the performance of His commandments and the study of His Torah.
Source: Gutnick Chumash: Excerpt from Tanya Chapter 17