Text 19] Nārada and Aṅgirā Instruct King Citraketu
67
“I was born in the darkest ignorance, and my spiritual master opened my eyes with the torch of knowledge. I offer my respectful obeisances unto him.” This gives the definition of the  guru . Everyone is in the darkness of ignorance. Therefore everyone needs to be enlightened with transcendental knowledge. One who enlightens his disciple and saves him from rotting in the darkness of ignorance in this material world is a true  guru .
TEXT 17
श्रीअङ्गिरा उवाच
अहं ते पुत्रकामस्य पुत्रदोऽस्म्यङ्गिरा नृप ।
एष ब्रह्मसुतः साक्षात्रारदो भगवानृषिः ॥१७॥
śrī-aṅgirā uvāca aham te putra-kāmasya putrado 'smy aṅgirā nṛpa eṣa brahma-sutaḥ sākṣān nārado bhagavān ṛṣiḥ
śrī-aṅgirāḥ uvāca—the great sage Aṅgirā said; aham—I; te—of you; putra-kāmasya—desiring to have a son; putra-daḥ—the giver of the son; asmi—am; aṅgirāḥ—Aṅgirā Rṣi; nṛpa—O King; eṣaḥ—this; brahma-sutaḥ—the son of Lord Brahmā; sākṣān—directly; nāradaḥ—Nārada Muni; bhagavān—the most powerful; ṛṣiḥ—sage.
TRANSLATION
Aṅgirā said: My dear King, when you desired to have a son, I approached you. Indeed, I am the same Aṅgirā Rṣi who gave you this son. As for this ṛṣi, he is the great sage Nārada, the direct son of Lord Brahmā.
TEXTS 18-19
इत्थं त्वां पुत्रशोकेन मग्नं तमसि दुस्तरे ।
अतदर्हमनुस्मृत्य महापुरुषगोचरम् ॥१८॥
अनुग्रहाय भवतः प्राप्तावात्रामिह प्रभो ।
ब्रह्मण्यो भगवद्भक्तो नावासादितुमर्हसि ॥१९॥