An expert can spot things a novice doesn't think to look for.
"Therefore you have no excuse, O man, every one of you who judges. For in passing judgment on another you condemn yourself, because you, the judge, practice the very same things." - Romans 2:1 ESV
"Judge not according to the appearance, but judge righteous judgment." - John 7:24 KJV
"I tell you, her sins -and they are many - have been forgiven, so she has shown me much love. But a person who is forgiven little shows only little love."" - Luke 7:47 NLT
Our past can make our eyes keen. What will we do with what we see?
The cross can be our frame of reference. Perception can pass through the cross. If it does we will be tender, discerning and loving.