Charles H. Spurgeon on Psalms 106:15

And he gave them their request. Prayer may be answered in anger and denied in love. That God gives a man his desire is no proof that he is the object of divine favour, everything depends upon what that desire is. But sent leanness into their soul. Ah, that "but!" It embittered all. The meat was poison to them when it came without a blessing; whatever it might do in fattening the body, it was poor stuff when it made the soul lean. If we must know scantiness, may God grant it may not be scantiness of soul: yet this is a common attendant upon worldly prosperity. When wealth grows with many a man his worldly estate is fatter, but his soul's state is leaner. To gain silver and lose gold is a poor increase; but to win for the body and lose for the soul is far worse. How earnestly might Israel have unprayed her prayers had she known what would come with their answer! The prayers of lust will have to be wept over. We fret and fume till we have our desire, and then we have to fret still note because the attainment of it ends in bitter disappointment.