What can I do (

There is such need in this world, what can we do?,sometimes we cant seem to do very much ,but pray. One writer has written the following,'Even if we are separated from people,  and even if there is no other gift we can give to them, we can surround them with the strength and the defence of our prayers'.,Gregory of  Nyssa .has written the following about prayer.' The effect of prayer is union with God, and if someone is with God ,he is separated from the enemy........It will refresh you when you  are weary and comfort you when you are sorrowful'.  We read in Isaiah 40 v 29 - 31,'He giveth power  to the faint; to them that have no might he increaseth strength. Even the youths shall faint and be weary, and the young men shall utterly fall; But they that wait upon the Lord shall renew their strength ; they shall mount up with wings as eagles; they shall run , and not be weary; and the shall walk, and not faint.'