When seeking solid, scripture-based life advice, a Christian should look to a combination of three primary sources: the inspired, authoritative Word of God itself (2 Timothy 3:16-17), mature, accountable church leadership (shepherds and elders), and trusted, humble Christian mentors who model godly wisdom. Advice must always be tested against the clear teachings of the Bible and should never rely solely on feelings, popular trends, or the counsel of the ungodly (Psalm 1:1).

The Old Testament is absolutely vital for Christians, as it is the foundation of the New Testament and reveals the complete story of God's redemptive plan. It remains relevant by showing us the character of God, the nature of sin, the necessity of a Savior, and providing enduring moral and spiritual principles (2 Timothy 3:16-17). While the ceremonial law is fulfilled in Christ, the rest of the Old Testament remains authoritative and instructive.  

No, Christians should not interpret the Bible to fit modern society. To do so is to replace God's unchanging authority with human opinion. The Bible is God-breathed (2 Timothy 3:16) and its words will never pass away (Matthew 24:35). We are warned against distorting Scripture (2 Peter 3:16) or listening to what our itching ears want to hear. The Christian mandate is to find the original, fixed meaning of the text and conform our lives to its truth.

A Christian should not read horoscopes or consult Tarot cards. The Bible strictly condemns all forms of divination and sorcery as detestable to the Lord (Deuteronomy 18:10–12). These practices are forbidden because they challenge the sufficiency of Scripture (2 Timothy 3:16) and show a lack of trust in God's guidance and provision (Proverbs 3:5). Believers are called to seek wisdom through prayer, the Holy Spirit, and the Bible (James 1:5).