54:4 Fear not that these prophecies may not come true, for G-d vows to their verity. So fear not to strengthen your pegs permanently (v2) - you shall not be shamed with another exile. You need not feel ashamed for what you went through in the past, for that disgrace will be all forgotten. The "shame of your youth," your ancient sins in the Land and the "disgrace of your widowhood," your sins of the exile, shall never be mentioned again. And this is because you will not sin again, having regained Adam's primordial level, a level at which you are in full control of your actions and will have no need for "embarrassment."