In the second line of Song of Solomon 1:2, the high-ranking lady contrasts the love of the king with other good things that she could experience regularly. She mentions the benefits of wine, which was regarded at that times as a means of getting strength and joy in one’s heart when one was feeling weak or sad.
There is nothing wrong with wine, and the author is not suggesting that people should not drink wine. Instead he is stressing that beyond the best, there is something better; that beyond the best that earth can give, there is the best that heaven can provide. If she had been satisfied with wine, then wine would be the height of her experience. But she knew that the love of the king was far superior.
Believers know that Jesus can give far more strength and joy than anything else can. Think of Isaiah 12:2-3: ‘“Behold, God is my salvation; I will trust, and will not be afraid; for the Lord God is my strength and my song, and he has become my salvation.” With joy you will draw water from the wells of salvation.’ As far as the lady in the song was concerned, this may be her looking back to previous encounters with the king. With believers, they can look back to many meetings with their loving Lord and speak about his love from experience. Always his love is better than the best.