One verse

Srimad Bhagavatam 11.2.40

11.2.40

एवंव्रत: स्वप्रियनामकीर्त्या जातानुरागो द्रुतचित्त उच्चै: । हसत्यथो रोदिति रौति गाय- त्युन्मादवन्नृत्यति लोकबाह्य: ॥ ४० ॥

evaṁ-vrataḥ sva-priya-nāma-kīrtyā jātānurāgo druta-citta uccaiḥ hasaty atho roditi rauti gāyaty unmāda-van nṛtyati loka-bāhyaḥ

evam-vrataḥ
when one thus engages in the vow to chant and dance
sva
own
priya
very dear
nāma
holy name
kīrtya
by chanting
jāta
in this way develops
anurāgaḥ
attachment
druta-cittaḥ
with a melted heart
uccaiḥ
loudly
hasati
laughs
atho
also
roditi
cries
rauti
becomes agitated
gāyati
chants
unmāda-vat
like a madman
nṛtyati
dancing
loka-bāhyaḥ
without caring for outsiders

By chanting the holy name of the Supreme Lord, one comes to the stage of love of Godhead. Then the devotee is fixed in his vow as an eternal servant of the Lord, and he gradually becomes very much attached to a particular name and form of the Supreme Personality of Godhead. As his heart melts with ecstatic love, he laughs very loudly or cries or shouts. Sometimes he sings and dances like a madman, for he is indifferent to public opinion.