What you see in others is at some level or version of what is in you in actuality or and in potential
כַּמַּיִם הַפָּנִים לַפָּנִים כֵּן לֵב הָאָדָם לָאָדָם-משלי כז יט
"As in water face to face so too the heart of man to man"
The growth question to ask is "How does this resonate with me, within me?"