By Nebo’s lonely mountain,
On this side Jordan’s wave,
In a vale in the land of Moab,
There lies a lonely grave.

You must do it alone.

not I, not anyone else can travel that road for you, you must travel for yourself.

All by myself I have to go, With none to tell me what to do — All alone beside the streams And up the mountain-sides of dreams.

One was there who left all his friends behind; Who going inland ever more and more, And being left quite alone, at last did find A lonely valley sheltered from the wind, Wherein, amidst an ancient cypress wood, A long-deserted ruined castle stood.

No one can construct for you the bridge upon which precisely you must cross the stream of life, no one but you yourself alone.

If you cannot get across it, you must get across it, nevertheless.

"You came in by yourselves, without His direction, and will go out by yourselves, without His mercy."
To

Far away I've travelled
To stand once more alone.
And hear my memories echo
Through these hills that I call home.
As a child I roamed this valley,
I watched the seasons come and go.
I spent many hours dreaming
On these hills that I call home.

Some journeys can only be traveled alone.

Not I, nor anyone else can travel that road for you.
You must travel it by yourself.
It is not far. It is within reach.
Perhaps you have been on it since you were born, and did not know.
Perhaps it is everywhere - on water and land.

No one can build you the bridge on which you, and only you, must cross the river of life. There may be countless trails and bridges and demigods who would gladly carry you across; but only at the price of pawning and forgoing yourself. There is one path in the world that none can walk but you. Where does it lead? Don’t ask, walk!

Some journeys in life can only be traveled alone.

Some walks you have to take alone.