Existential prayer is one form of mystical contemplation. It is the prayer of just being. It has few words; and perhaps it has no images at all. In this prayer I just AM -- like the flower of the field or the birds of the air; and by just being I give glory to God.
Without doing anything, things can sometimes go more smoothly just because of our peaceful presence. In a small boat when a storm comes, if one person remains solid and calm, others will not panic and the boat is more likely to stay afloat.