Since that they may be seen of men' constitutes the evil, we may fairly say that Christ is not here prescribing the place where, but the spirit in which, we ought to pray; that what He condemns is not the fact of praying where we can be seen, but of picking out the place in order that we may be seen; that, in a word, the contrast here is between ostentation and sincerity. A man that has sidelong looks at the passers-by in his devotions has not much devotion.
But then, as a material help to this, we need solitude and secrecy; they are not indispensable, but almost so. And in that solitude what is to be our occupation? One word answers the question--Communion. We are to be alone that we may more fully and thrillingly feel that we are with God. That communion will have an intellectual element in which we try to rise to perception of the high truths as to God, or in meditation gaze on Him, and a petitionary element in which we ask for the communication of His grace according to our needs.