How do we know Jesus meets the qualifications of a High Priest?

In Hebrews 5, we find that Jesus meets the necessary qualifications to serve as our High Priest. First, He is fully human, 'taken from among men,' which allows Him to understand our conditions. Second, He was publicly appointed and anointed by God, signifying His divine sanctioning of His role. This is evidenced during His baptism when God declared Him as His beloved Son. Most notably, He is characterized by compassion, being able to identify with those who are ignorant and lost, having experienced human frailty Himself. His supremacy over previous high priests is particularly emphasized by His sinlessness and singular, definitive sacrifice for sin.