Since we are each, from eternity, unique souls - then there is an unique destiny, a personal destiny, for every individual.
But discovering (and then, of course, following) one's unique destiny is a difficult matter, and many people don't know how to start - or how an unique destiny differs from randomness or arbitrariness.
To make an unique destiny possible requires both internal and external guidance, and it is from the dynamic polarity of their relationship that we can navigate our destined (but not pre-destined) path through life.
Our external guidance is known as the Holy Ghost, and is accessible to all Christians; since the Holy Ghost (according to the Fourth Gospel) was provided by Jesus after his ascension.
Yet if the Holy Ghost had been the only kind of guidance, then our destiny would be 'given' to us; and our task would merely be to consult the Holy Ghost, and then passively to 'follow' its instructions, as best we could.This would be a life a spiritually children (and was indeed our own life as children, and probably the life of all Men in earlier periods of Man's history.)
Such a life of obedient passivity is a one-sided caricature, because it never was, nor could be, wholly the case; but this life of child-like obedience to external dictates was surely once regarded as an ideal; wheras now a passively obedient life is Not the task of modern Man.
(Such a life is simply Not An Option. Modern Man is an adolescent in spiritual terms, negatively rejecting of passive obedience; and as adolescents we cannot return to childhood. Our task is freely to choose to develop, to grow-up, into spiritual adults... or else we will remain, as we are: perpetually adolescent.)
Due to the evolutionary-development of human consciousness since the time of Jesus, our task is now to take an active, conscious path through life - freely chosen. This does Not At All mean that the Holy Ghost has been superseded, but instead that we now have a 'dual guidance system' formed from the interaction of outer and inner.
The inner guidance comes from our real self; the eternal self that is divine; albeit an undeveloped divinity; which is how it can be the creative source of uncaused thinking, primary thinking. A life guided solely by the inner guidance system would be merely egotistic, prideful, rebellious, hedonistic, impulsive - adolescent.
But outer and inner guidance combine to form a classic polarity; in the sense that the outer guidance is centripetal, constraining, receptive, 'feminine'; while the inner guidance is centrifugal, generative, exploratory, 'masculine'.
This is a polarity because although they can legitimately be distinguished, neither guidance can exist in actual detachment from the other - and this union arises because at a deep level outer and inner are continually-being-produced-consequences of a single, living, conscious, dynamic process.
So our task in this mortal life is therefore actively to work from our own inner motivation, which is in continual interaction with the Holy Ghost. The result is experienced as 'intuition', which is our directly known direction and purpose through life.