Why might the Bible demand: “God requireth that which is past”? It can be so alluring to recall memories. What is the harm in that? Three big reasons come to mind: Sentimentality, regret, resentment.
"Let no man deceive you by any means: for that day shall not come, except there come a falling away first." (II Thes 2)
"A man's enemies are the men of his own house." (Micah 7:6)
“Ye cannot serve God and mammon.” (Matt 6:24)
And here is a case study:
I Corinthians 13 revisited.
Though I am a superb lecturer leaving my audience uplifted and inspired,
Though I have a profound understanding of metaphysics and the Bible, etc.,
Though I have a tremendous healing record,
Though I am incredibly generous with my wealth helping those in need,
Though I am willing to sacrifice my body in service to others,
... and have not love, it is all worthless. WHAT???? I thought all this WAS love. What is going on here?