18.63 Thus the knowledge, the mystery of mysteries, has been declared to you be Me. Reflecting on it fully, do what you will.
English Translation By Swami Sivananda
18.63 Thus has wisdom, more secret than secrecy itself, been declared unto thee by Me; having reflected over it fully, then act as thou wishest.
English Translation By Swami Gambirananda
18.63 To you has been imparted by Me this knowledge [Derived in the instrumental sense of 'means of knowledge'; i.e. the scripture Gita.] which is moe secret than any secret. Pondering over this as a whole, do as you like.
English Translation By By Dr. S. Sankaranarayan
18.63. Thus the [path of] wisdom, a better secret than all the secrets has been expounded to you by Me; comprehend it fully and then act as you please.