Charles H. Spurgeon on Psalms 145:5

I will speak, etc. I will "muse" is better than "speak", as being the primary and more usual sense of the Hebrew word. It suggests that these glorious qualities of God's character and deeds should be not merely talked about and extolled in song, but be deeply pondered, laid close upon our very heart, so that the legitimate impression may be wrought into our very soul, and may mould our whole spirit and character into God's own moral image. —Henry Cowles.