We do know what unlimited love looks like. People saw Him.
“This is my commandment, that you love one another as I have loved you. Greater love has no man than this, that a man lay down his life for his friends. You are my friends if you do what I command you.” (John 15:12-14)
“A new commandment I give to you, that you love one another; even as I have loved you, that you also love one another. By this all men will know that you are my disciples, if you have love for one another.” (John 13:34-35)
“But if any one has the world’s goods and sees his brother in need, yet closes his heart against him, how does God’s love abide in him? Little children, let us not love in word or speech but in deed and in truth. By this we shall know that we are of the truth ” (1 John 3:17-18)