ESV: They are created now, not long ago; before today you have never heard of them, lest you should say, ‘Behold, I knew them.’
NIV: They are created now, and not long ago; you have not heard of them before today. So you cannot say, ‘Yes, I knew of them.’
NASB: They are created now and not long ago; And before today you have not heard them, So that you will not say, ‘Behold, I knew them.’
CSB: They have been created now, and not long ago; you have not heard of them before today, so you could not claim, ‘I already knew them!’
NLT: They are brand new, not things from the past. So you cannot say, ‘We knew that all the time!’
KJV: They are created now, and not from the beginning; even before the day when thou heardest them not; lest thou shouldest say, Behold, I knew them.
NKJV: They are created now and not from the beginning; And before this day you have not heard them, Lest you should say, ‘Of course I knew them.’
