The phrase "abiding truth" refers to a truth that remains constant and true over time. It implies that the truth is enduring and does not change or fade away. Full definition
He finds a tricky balance of absurd humor and abiding truth in telling what is clearly a very personal story. (rogerebert.com)
You will immediately protest that I am canonizing every syllable of the New Testament as if it were part of the unchanging wisdom of God, and that I am varnishing its errors and its obsolete thought with the splendor of abiding truth. (religion-online.org)
phobic groups like the Westboro Baptists, The Traditional Values Coalition, The Pray in Jesus Name Project, Faithful Word Baptist Church, Truth In Action Ministries, The Sons of Thundr, Abiding Truth Ministries, and the Pilgrims Covenant Church. (religion.blogs.cnn.com)