When I said, My foot slippeth; thy mercy, O LORD, held me up.
When I said, My foot slippeth; thy mercy, O Lord, held me up. Here he explains Psalms 94:17. The occasion of thy "help" was when I was almost giving way to despair and apostasy. The spiritual slipping of the foot and the upholding mercy of the Lord are vividly typified by Peter's foot sinking through unbelieving fear of the boisterous winds and waves, until Jesus stretched forth His hand and caught him (Matthew 14:30-31: cf. Psalms 66:9). The trial here is inward and the mercy vouchsafed inward (cf. Psalms 94:19). The outward deliverance is yet future.