[Dr. Eckleburg]

Not only does it teach against presumption, but its says "For everyone who exalts himself will be humbled, and he who humbles himself will be exalted."

There is so much assurance in Scripture a person would have to be blind to miss it.

And that is because our assurance is built on His strength, His righteousness, His sacrifice, and not our own.

"And he (the Lord) said unto me, 'My grace is sufficient for thee: for my strength is made perfect in weakness.' Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me.

Therefore I take pleasure in infirmities, in reproaches, in necessities, in persecutions, in distresses for Christ's sake: for when I am weak, then am I strong." -- 2 Corinthians 12:9-10

[kosta50]

And that is because our assurance is built on His strength, His righteousness, His sacrifice, and not our own...2 Cor 12:9-10

The subject was security of salvation. The verses you provide are not on the topic.