Your phrase "I know whom I have believed" is a well-known biblical expression, often cited from 2 Timothy 1:12 in the New Testament. It conveys a strong sense of faith and trust in God or Jesus Christ. If you'd like, I can provide:
- The full verse in context
- An explanation of its meaning
- How it is used in religious or literary contexts
- Related passages or devotional reflections
Please let me know how you'd like me to assist!