We can't grow from only our knowledge and needs hope

We need to have a good foundation in Christ. It is good to know the basics but we must mature and know the deep things of God. The believer in Jesus needs to become a mature believer and stand with the help of the Lord.
People can brag about how good they are but the glory should belong to the Lord. The growth in that person life is a gift from the Lord. We must read the Bible and ask the Lord to teach us the deep meanings of the Bible.
The Bible is the Word of God. When a person reads the Bible, they will understand God.
The problem in most Bible-believing, Christian based churches are that many churches don't have a deep understanding of God;therefore, they follow the culture, instead of the Lord.
The church needs to focus on the Lord.
The context of Hebrew 6:3 was written to the Jewish believers in Jesus, that they need to grow in the knowledge of Jesus.
If the Jewish person wasn't proactive in searching the Lord then they were big infants. God will give them the power and the non-Jews to grow. It is a gift from the Lord but we must accept it.

Hebrews 6:3

 And God permitting, we will do so.