I said in my haste, All men are liars.
I said in my haste - i:e., in my trepidation ... my consternation, caused by my 'great affliction' (Psalms 31:22). The relation between the Hebrew, "I said" х 'aamar (H559)], here, and "I have spoken," in Psalms 116:10, is that the latter х daabar (H1696)] rarely has the words spoken following immediately (Gesenius): which disproves Maurer's translation, 'I believed, though I was saying, 'I am greatly afflicted.' The Hebrew particle х kiy (H3588)] is here used (Psalms 116:10) in the sense "therefore," instead of the usual 'because:' so "for" is used as wherefore, Luke 7:47; 2 Corinthians 4:13 decides it.
All men are liars - i:e., disappoint the hopes of those who trust in them (Psalms 108:12; Psalms 62:9; Psalms 146:3). But as the 'speaking' was prompted by 'believing' (Psalms 116:11), this negative expression of distrust of man was accompanied by his positive expression of trust in God, who never disappoints (Psalms 118:8). "Therefore have I spoken" probably refers to his believing prayer to God which accompanied his expression of distrust in "men" as helpers. So Mariana.