who knoweth whether # 21_ECC_02_19 # And who knoweth whether he shall be a wise [man] or a fool? yet shall he have rule over all my labour wherein I have laboured, and wherein I have showed myself wise under the sun. This [is] also vanity. 
who knoweth whether # 17_EST_04_14 # For if thou altogether holdest thy peace at this time, [then] shall there enlargement and deliverance arise to the Jews from another place; but thou and thy father's house shall be destroyed: and who knoweth whether thou art come to the kingdom for [such] a time as this?