The song "You Never Know" by Heartless Bastards is an exploration of taking chances and risks in love. The lyrics describe the speaker's desire to ask someone to stay and hold them in their arms, despite the risk of heartbreak. The speaker acknowledges that they are unsure of what the future holds, but feel compelled to take a chance and see where this relationship could lead. The chorus repeats the line "You never know unless you let yourself see / You never know unless you open up your eyes," emphasizing the importance of taking risks and being open to new experiences in order to truly understand and appreciate them. The song also touches on the themes of aging, growth, and self-discovery, with the speaker declaring that they are becoming bolder, wiser, and brighter. Overall, "You Never Know" is a hopeful and optimistic message about the beauty and potential of taking risks in love and in life.