J.i. Packer said this quote

Optimism hopes for the best without any guarantee of its arriving and is often no more than whistling in the dark. Christian hope, by contrast, is faith looking ahead to the fulfillment of the promises of God, as when the Anglican burial service inters the corpse 'in sure and certain hope of the Resurrection to eternal life, through our Lord Jesus Christ.' Optimism is a wish without warrant; Christian hope is a certainty, guaranteed by God himself. Optimism reflects ignorance as to whether good things will ever actually come. Christian hope expresses knowledge that every day of his life, and every moment beyond it, the believer can say with truth, on the basis of God's own commitment, that the best is yet to come.

~ J.i. Packer

What is less often noticed is that it is precisely the kind of moral instruction that parents are constantly trying to give their children — concrete, imaginative, teaching general principles from particular instances, and seeking all the time to bring the children to appreciate and share the parent's own attitudes and view of life… The all-embracing principles of conduct

~ J.i. Packer

Confidence that one's impressions are God-given is no guarantee that this is really so, even when they persist and grow stronger through long seasons of prayer. Bible-based wisdom must judge them.

~ J.i. Packer

Wait on the Lord is a constant refrain in the Psalms, and it is a necessary word, for God often keeps us waiting. He is not in such a hurry as we are, and it is not his way to give more light on the future than we need for action in the present, or to guide us more than one step at a time. When in doubt, do nothing, but continue to wait on God. When action is needed, light will come.

~ J.i. Packer