To your low and trembling spirit:

Bunyan comments on Eph. 3:17-19--

[Breadth, length, height and depth] are made use of the show the Ephesians, that God with what he is in himself, and with what he hath in his power, is all for the use and profit of the believers...As who should say, the High God is yours; the God that fills the heaven and earth is yours; the God whom the heaven of heavens cannot contain, is yours; yea, the God whose works are wonderful and whose ways are past finding out, is yours...It is my support, it is my relief; it is my comfort in all my tribulations, and I would have it yours, and so it will when we live in the lively faith thereof.

...So we should conclude that all this is love to us, for Christ's sake; and then dilate with it thus in our minds, and enlarge it thus in our meditations; saying still to our low and trembling spirits: 'It is high as heaven; what canst thou do?  deeper than hell; what canst thou know?  the measure thereof is longer than the earth, and broader than the sea.'

-John Bunyan, All Loves Excelling, pp. 5-6.