Passage
For His messengers He chargeth for thee, To keep thee in all thy ways,
For His messengers He chargeth for thee, To keep thee in all thy ways,
Psalms 91:9 (For Thou, O Jehovah, <FI>art<Fi> my refuge,) The Most High thou madest thy habitation.
Psalms 91:10 Evil happeneth not unto thee, And a plague cometh not near thy tent,
Psalms 91:11 For His messengers He chargeth for thee, To keep thee in all thy ways,
Psalms 91:12 On the hands they bear thee up, Lest thou smite against a stone thy foot.
Psalms 91:13 On lion and asp thou treadest, Thou trampest young lion and dragon.
The verse centers on "messengers", "chargeth", "thee", "keep", and "ways". It is saying that the verse draws attention to "messengers" and "chargeth", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 10's "Evil happeneth not unto thee And a..." into verse 12's "On the hands they bear thee up...", so "messengers" and "chargeth" belong inside that flow. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "messengers" and "chargeth" with trust shaped by these words, not by a vague optimism outside the passage.