Indeed! Siri Guru Nanak Dev jee is greatest of all.
Gur Nanak jinn suniya pekhiya, te phir garbhaas na pariya re||
(Whoever has listened to Guru Nanak (listened to his updesh i.e. Gur Shabad) and whoever has attained darshan of Guru Nanak, has never come back to the womb of mother (i.e. has been relieved from this cycle of birth and death).
Siri Guru jee's gurpurab (Some say it's in Vaisaakh) is coming up this month. Let's resolve to listen to Siri Guru Nanak Dev jee (jin suniya) and beg for his darshan (pekhiya).