Matthew 3:15 (KJV) And Jesus answering said unto him, Suffer it to be so now: for thus it becometh us to fulfil all righteousness. Then he suffered him.
Isaiah 42:21 The LORD is well pleased for his righteousness’ sake; he will magnify the law, and make it honourable.
Matthew 5:17 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.
A blog post can only introduce a topic but not cover it in depth. For more study on various topics, click here for links to various Christian ministries.
Depending on the ministry, there may be online church services, YouTube videos, podcasts, radio programs, books, teaching, or more. You have to seek out what they have.