King Solomon was known around the world for his wealth and wisdom and characterized Israel's most successful empire. He was given this glory and honour because of God's promises to his father David as well as for Solomon's request for wisdom instead of long life or riches or the death of his enemies at his first visit from God (1 Kings 3:5-14). 
Unfortunately, Solomon didn't remain faithful to the Lord for his whole life. Because of his foreign wives he was led astray and worshiped their foreign gods. The verse that describes this is 1 Kings 11:9 "The Lord was very angry with Solomon, for his heart had turned away from the Lord, the God of Israel, who had appeared to him twice." This phrase was what caught my attention, "appeared to him twice". I have heard the excuse said, "I will believe in God if I see [him or miracle etc.]." But, this verse is demonstrating that even with "seeing" the believing doesn't always last. So, the challenge for those who haven't seen or heard the Lord personally, that faith has to be independent of that. And for those of us who have seen or heard the Lord need not relax and think we've got it covered.