"Now I Know" is a 1967 song written by Stanley Jay Gelber and Scott English. It was most notably released as a single by Eddie Fisher and later Jack Jones, both in May 1967. The song was composed by James Last, who would include an instrumental version of the song in his 1967 Games That Lovers Play album.
After the modest success with "People Like You", Eddie Fisher recorded "Now I Know" with "I Haven't Got Anything Better to Do" as the B-side in 1967. William Ruhlmann of AllMusic commented that "'People Like You' barely registered on the pop charts," and that "'Now I Know' got even less attention in the spring."
It was his last charting single, and his recording career basically came to an end, with Fisher only recording a tribute album You Ain't Heard Nothin' Yet the next year. The song reached No. 23 on the Easy Listening chart. On Record Worlds Top Non-Rock, the song peaked at No. 19, and on the magazine's Up-Coming Singles chart the song peaked at No. 14, (No. 114 with the 100 Top Pops).
The single gained short, but positive reviews upon its release. Record World put the single in its "Single Picks of the Week", and wrote: "Eddie Fisher makes it three in a row with 'Now I Know,' a tearful, sentimental ballad," and added that "It is the kind of single that makes good music better." Cashbox said that the single had "noisemaking offerings", noting that "Middle of-the-roaders should dig this pretty, swaying charmer." The described the flip as a "melancholy ballad" as well.
Jones's version peaked at No. 73 on the Billboard Hot 100 and No. 3 on the Easy Listening chart. The single was also ranked at No. 43 on the Easy Listening chart's year-end top 50 list. The track debuted on Cashbox magazine's Top 100 Singles chart in the issue dated June 3, 1967, reaching No. 74 during a seven-week run on it. It debuted on Record World magazine's Top Non-Rock chart at the same time, peaking at No. 3. It appeared on the magazine's Pop Singles charts on June 17, reaching No. 71 after two weeks.
After his next single, "Our Song", did well on the charts, Jones recorded an album with the same name, which included "Now I Know" and its B-side.