be so deeply versed in a subject as to be able to present it with ease; wear one's learning lightly;
share sb.'s joys and sorrows; go through thick and thin together;
Good natured and easy to approach.
Joy, anger, sorrow, happiness
The will of an old man does not fade.
cherish high aspirations; be fearless and high-hearted; with soaring aspirations;
Extraordinary talent and courage.
as pretty as flower and jade
