Charles H. Spurgeon on Psalms 84:6

The rain. Little as there may be of water, that little suffices on their way. It is a well to them. They find only "pools (which) the early rain has (barely) covered" —but are content with the supply by the way. It is as good and sufficient to them as if showers of the heavy autumnal rains had filled the well. Pilgrims forget the scanty supply at an inn, when they have abundance in view at the end. Israelites going up to the Passover made light of deficient water, for their hearts were set on reaching Jerusalem. Andrew A. Bonar.

Verses 6-7. The most gloomy present becomes bright to them: passing through even a terrible wilderness, they turn it into a place of springs, their joyous hope and the infinite beauty of the goal, which is worth any amount of toil and trouble, afford them enlivening comfort, refreshing, strengthening in the midst of the arid steppe.

Not only does their faith bring forth water out of the sand and rocks of the desert, but God also on his part lovingly anticipates their love, and rewardingly anticipates their faithfulness: a gentle rain, like that which refreshes the sown fields in the autumn, descends from above and enwraps the valley of Baca in a fulness of blessing... the arid steppe becomes resplendent with a flowery festive garment (Isa 35:1-19), not to outward appearance, but to them spiritually, in a manner none the less true and real. And whereas under ordinary circumstances, the strength of the traveller diminishes in proportion as he has traversed more and more of his toilsome road, with them it is the very reverse; they go from strength to strength.—Franz Delitzsch.