Imagine the scene: A small child is playing hide and seek with their parent, the child hides (probably not very successfully) and the parent goes to find them.
The parent feigns surprise "Where could s/he be?" this last for as long as the child can manage until the suspense is unbearable for the child in question (a couple of minutes max). Then the child bursts from the hiding place and calls "Here I am" with pure joy at both the game and being found.
The child is open, desperate to be found, desperate to fix the separation which has occurred through the natural course of the game. I'm here, I'm available to play again/have a cuddle/enjoy your company is implicit in that 3 word response. So simple yet so powerful.
1 Samuel 3:4 Then the LORD called Samuel. Samuel answered, "Here I am."
Lord God, teach me to be open of heart and mind and spirit. Give me the courage to respond "Here I am" when you call. Amen.