For thou hast delivered my soul from death. This verse is exegetical of the last clause of Psalms 116:4. The expressions are taken from Psalms 56:13, and suit a personal better than a national deliverance.
Mine eyes from tears. Hezekiah, when told that his death was approaching, had "wept sore" (Isaiah 38:3). And my feet from falling; literally, and my foot from slipping When man is greatly tried, there is always danger lest his foot should slip.
Whether the trial befall an individual or a nation, there is the same temptation to rebel and murmur.