Lamentations 3:23

Second, an approbation from the Lord's divine mercy is indicated. "They are new every morning; great is thy faithfulness." Namely, as I, the Lord God, openly approve. Again: "great is thy faithfulness." That is, regarding Jeremiah, who, among your suppliants, acknowledge you. For, the Apostle Matthew reports: "Then Jesus answered her, 'O woman, great is your faith! Be it done for you as you desire'." (Matthew 15:28).

Lastly, there is this value about the colour that men call colourless; that it suggests in some way the mixed and troubled average of existence, especially in its quality of strife and expectation and promise. Grey is a colour that always seems on the eve of changing to some other colour; of brightening into blue or blanching into white or bursting into green and gold. So we may be perpetually reminded of the indefinite hope that is in doubt itself; and when there is grey weather in our hills or grey hairs in our heads, perhaps they may still remind us of the morning.