"Little children stumble often, but they are too little to hurt themselves very much." - St. Therese

"We stumble mostly by choice."

Not always.  The thought,  'we stumble mostly by choice' is true in a literal sense of course, in so far as it concerns grave sin, for a sin to be mortal, there must be full consent of the will.  I do not want to make a big deal of this, but the statement caught my attention.  We trip or stumble frequently by accident, something trips us up.  Sometimes we falter and are unsteady, we can lose our balance - something precedes the fall - scripture tells us it is pride.

Generally, I think many people stumble and fall more through human weakness, rather than malice.  I may be wrong.  Sick people need a doctor.  Some need therapy - frequent confession and guidance - and a lot of prayer.  Really sick people sometimes can't get up on their own.  Children and weaker souls can be like that.  Surely they do not choose to stumble.  When people are in recovery - they often relapse.  See the different point of view here? 

Justice and peace, mercy and truth.

When my brother was dying I sensed the disgust of his doctor and some of the nurses.  He looked horrible, blood from his eyes and pores, a 45 year old fat alcoholic, dying of liver disease.  They might as well have told me that he made the choice to die an alcoholic.  Some will insist he made a series of choices, aka the stages of sin - but there is never reason to lose hope, nor to write off  someone who has fallen so low.

"There is no pit that his love is not deeper still."

Betsy Ten Boom said that in the concentration camp, amidst such horror, suffering and sin.  She understood that Christ was there - already! - his gaze meeting the soul who stumbled and fell.  It is good to understand that aspect of Christ's stumbling and falling.  He descended into the depths to meet us where we have fallen.  He chose us first.

Confidence and love.

 "It is to recognize our nothingness, to expect everything from God as a little child expects everything from its father; it is to be disquieted about nothing, and not to be set on gaming our living. ... To be little is not attributing to oneself the virtues that one practices. ... It is not to become discouraged over one's faults, for children stumble and fall often, but they are too little to hurt themselves very much."  - St. Therese

We get what we hope for.

'We can never have too much confidence in the Good God, He is so mighty, so merciful. 

As we hope in Him so shall we receive.'

"Lead us not into temptation, but deliver us from evil."   I think that is why the prayer says what it does.