We know that we all possess knowledge. Knowledge puffs up, but love builds up.
What is more important? That I impress you with all my vast knowledge of a subject, (me being puffed up), or loving you and helping you to be strong in your own knowledge and convictions – building you up.
Basically, it means taming your knowledge, your convictions, your habits to the love of Christ. Considering your brother or sister in Christ as better than yourself. (Phil 2: 3 and 4)