The normal state of man is to have thoughts. Usually he takes himself to be his thoughts; he is his thoughts and not the one who is thinking. As long as he remains in this state, he cannot attain anything higher. The goal of meditation is to attain to this direct experience of the consciousness of oneself. But we know that it is impossible to stop the flow of thoughts and enter directly into consciousness, since thoughts act as a barrier between oneself and the spirit. So it is necessary to go through them, as it were, to "transcend them" (without suppressing them) by applying the techniques of meditation.
The technique usually used in this Teaching is a form of zazen meditation in which we are seated with our back straight, centered on our abdominal respiration and posture.