諸經要集 2.24

2.24

聽者端心如渴飲　一心入於語義中
聞法踊躍心悲喜　如是之人可為說

The listener focuses their mind like one who thirsts for drink,
with single-minded concentration entering into the spoken meaning;
hearing the Dharma, they leap with joy, their heart filled with sorrow and delight—
for such a person, it may be preached.