As humans we are all timid. To become brave to have courage in life means we have overcomes our fears. David uses the imagery of God putting all his tears in a bottle. We will be surprised one day when in Christs presence we are made aware of all the many moments of fear and tearfulness that Christ was with us. God is not aloof or distant or uncaring. Christ knows our pain, he has lived it!
In God I Trust To the choirmaster: according to The Dove on Far-off Terebinths.
A Miktam of David, when the Philistines seized him in Gath. 1 Be gracious to me, O God, for man tramples on me; all day long an attacker oppresses me; 2 my enemies trample on me all day long, for many attack me proudly. 3 When I am afraid, I put my trust in you. 4 In God, whose word I praise, in God I trust; I shall not be afraid. What can flesh do to me? 5 All day long they injure my cause;[b] all their thoughts are against me for evil. 6 They stir up strife, they lurk; they watch my steps, as they have waited for my life. 7 For their crime will they escape? In wrath cast down the peoples, O God! 8 You have kept count of my tossings;[c] put my tears in your bottle. Are they not in your book? 9 Then my enemies will turn back in the day when I call. This I know, that[d] God is for me. 10 In God, whose word I praise, in the Lord, whose word I praise, 11 in God I trust; I shall not be afraid. What can man do to me? 12 I must perform my vows to you, O God; I will render thank offerings to you. 13 For you have delivered my soul from death, yes, my feet from falling, that I may walk before God in the light of life.