How Can I Be Sure - Single Version; Mono

This song was a follow-up to "Groovin'," and was a huge hit. It's a soulful ballad about the doubts of one's first great love, particularly when the love is one-sided. The song was popular enough that it was covered by many artists, most notably David Cassidy in 1972, whose version reached #25 on the Billboard Top 100.

Like "Groovin'," this was written by Rascals Felix Cavaliere and Eddie Brigati. Both tunes, as well as "I've Been Lonely Too Long," came out of Cavaliere's experience of falling in - and out - of love. "All of those love songs were about this one particular person," he told Music Connection in 2022. "And it was so interesting and the culmination was 'How Can I Be Sure.' And then it was over. Things happen for a reason and the reason was to write those songs. That is what she was there for. The word muse is real. The stories were genuinely about being in love."

The Young Rascals' original version didn't hit in the UK and the first time it charted was in 1970 when a revival by Dusty Springfield scraped into the charts at #36. Two years later David Cassidy, who was at the time along with The Osmonds the most popular teen idol in the UK, went all the way to the top of the British singles chart with his cover.