Try to go beyond thinking
The soul loves to meditate, for in contact with the Spirit lies its greatest joy. If, then, you experience mental resistance during meditation, remember that reluctance to meditate comes from the ego; it doesn’t belong to the soul.
When a person is really sleepy, can’t he fall asleep anywhere? So is it with the person who loves God. He can meditate even in a train station or in the market place.
To meditate a short time with depth is better than to meditate for long hours with the mind running wild.
In the beginning, therefore, don’t force yourself to sit for a long time. Strive for shorter, but deeper, meditations. Then gradually, as you become accustomed to going deep, lengthen the time you sit in meditation.