"Seek the Lord while he may be found; call on him while he is near" (Isa 55:6).
"Isaiah 54 - 55 constitute one of the most beautiful pieces of literature in the entire Bible." John Oswalt, Isaiah, The NIV Application Commentary.
"Try and suck all the sweetness that you can out of (Isaiah 54) while we read it. The personal application of a promise to the heart by the Holy Spirit is that which is wanted. This chapter is ... drip with virgin honey. Sip: taste, and be satisfied." Charles Spurgeon.
Why we might be slow to respond: “It would seem that Our Lord finds our desires not too strong, but too weak. We are half-hearted creatures, fooling about with drink and sex and ambition when infinite joy is offered us, like an ignorant child who wants to go on making mud pies in a slum because he cannot imagine what is meant by the offer of a holiday at the sea. We are far too easily pleased.” C.S. Lewis.