How often do we long for something or wait expectantly only to find we tire of the thing after a while? We will sometimes jump through hoops to get something material but put off seeking a spiritual pleasure.
St Gregory has it about right.
There is a great difference, dearly beloved brethren, between corporal and spiritual delights in that the former, when we are without them, enkindle in the soul a strong desire to possess them, but once they are are attained, they quickly satiate us. Spiritual pleasures, on the contrary, when unattained, produce a certain aversion; but once we taste them the taste awakens desire, and our hunger for them increases the more we taste them..so we see that, if we do not taste these delights,we cannot desire them, because their flavour is unknown to us...so that the psalmist says ’Taste and see that the Lord is sweet’ ( Psalm 33.9 )