If you are joyful, do not worry about lukewarmness. Joy will shine in your eyes and in your look, in your conversation and in your countenance. You will not be able to hide it because joy overflows.
We must cast away everything which hinders us upon our road towards heaven – the lust of the flesh, the lust of the eye and the pride of life; the love of riches, pleasures and honors, the spirit of lukewarmness and carelessness and indifference about the things of God – all must be rooted out and forsaken if we are anxious for the prize. We must mortify the deeds of the body, we must crucify our affections for this world.
Lukewarmness I account a sin, as great in love as in religion.
God requires to be represented by a fiery Church. . . two things are intolerable to Him-insincerity and lukewarmness.
Indifference, lukewarmness, and neutrality are always attached to failure.