I would answer, “Just a little…for the rest of my life.”
I would hold up my fingers in the “just a little” sign and then I would, in one swooping motion, stretch my arms as far as I could reach and say, “This much.”
My daughters could not grasp the theory of “infinity”.
But they could understand a visual aid of me standing with my arms stretched as far wide as I could.
This would also later play a role and lay a foundation for them understanding how much God loved them and certainly how much Christ loved them with outstretched arms on the cross.
When I share my faith and someone asks me to explain how much God loves them, I have stood up at times, stretched out my arms and said, “I am sorry. But I can not. It stretches too far for me to comprehend. I can not explain it, but I know He does.”
God’s love can not be explained.
Men who try are men who fail at the attempt.
It has to be experienced, felt if you will, by the child him or her self, by the person who is wrestling with their faith or the one who has no concept of God at all, yet they know that their life is void and without meaning, and that something unexplained, calls to them, like a gentle scream within their soul.
As was the case with my daughters, a visual aid is the best tool.
Arms stretched wide…saying, “God loves you just a little…for the rest of His life.”
“And may you be able to feel and understand, as all God’s children should, how long, how wide, how deep, and how high his love really is; and to experience this love for yourselves, thought it is so great that you will never see the end of it or fully know or understand it.” Ephesians 3:18-19