The simple— i.e. Those who are upright and sincere, and who make use of no crafty arts, no indirect or unlawful means for their deliverance; or, as the original word likewise signifies, the little ones; i.e. those who wholly depend upon God, as little children do upon their parents.
Related Commentaries of Psalms 116:6
Psalms 116:6
6 The LORD preserveth the simple: I was brought low, and he helped me.