on the threshold of

on the threshold of something

near the beginning of something Tyler is on the threshold of becoming a very successful singer.
Etymology: based on the literal meaning of threshold (the part of the floor at the entrance to a room or building)
See also: of, on, threshold
References in classic literature ?
Finding it so directly on the threshold of our narrative, which is now about to issue from that inauspicious portal, we could hardly do otherwise than pluck one of its flowers, and present it to the reader.
All this time, however, we are loitering faintheartedly on the threshold of our story.
young Spring Lies on the threshold of maternity, And still he comes not.
Beaufort was receiving on the threshold of the crimson drawing-room.
And would he appear on Saturday, the 21st of December, at a quarter before nine in the evening, on the threshold of the Reform Club saloon?
I pointed out to Miss Wendermott that you were in the prime of life and in magnificent condition, while her father was already on the threshold of the grave and drinking himself into a fever in a squalid hut in a village of swamps.
When this species of cyclops appeared on the threshold of the chapel, motionless, squat, and almost as broad as he was tall; squared on the base, as a great man says; with his doublet half red, half violet, sown with silver bells, and, above all, in the perfection of his ugliness, the populace recognized him on the instant, and shouted with one voice,--
A man came slowly into view, and stopped on the threshold of the door.
With a desperate effort, Grace broke away from him, and stopped Lady Janet on the threshold of the conservatory door.