We find in all creatures diversities which distinguish them one from another, but the purity of God's Essence admits of no distinction; so that His Being is His Essence, His Essence is His Power, His Power is His Will, His Will is His Understanding, His Understanding is His Being, His Being is His Wisdom, His Wisdom is His Justice, His Justice is His Mercy. And though the last two attributes are differently manifested, the duty of mercy being to pardon, that of justice to punish, yet they are one and the same power.
--Bl. Louis de Granada, The Sinner's Guide
Taken from The Catholic Breadbox, my Catholic quotations blog.