Diksa-guru and siksa-guru equally respected

"There are two kinds of spiritual masters: the initiating spiritual master or diksa-guru, and the instructing spiritual master or siksa-guru. Both gurus have to be respected equally. This is the key to spiritual success. The diksa-guru initiates a person into the chanting of the holy name and the diksa-mantra, while the siksa-guru imparts spiritual conclusions to the disciple. This spiritual knowledge specifically means sambandha-jnana or the knowledge of the jiva’s relationship with the Supreme Lord and his multifarious energies. The diksa-guru is one but siksa-guru can be many. In fact all the Vaisnava devotees are siksa-gurus, but both the diksa-guru and the many siksa-gurus are to be equally respected.

The teaching of the adi-guru must be followed

"The Vaisnava disciplic successions are the real lines of saintly teachings and teachers. The Vaisnava lines have always disseminated the bona fide mantras, the proper scriptural conclusions, the authorized devotional process and the ultimate goal of life. If one is to be protected from the perils of mayavadi philosophy, then he should surrender to a spiritual master from a saintly line—namely a Vaisnava line.

The material body can be likened to a computer/machine. Each person operates his own private computer/machine, and when he is finished using his machine, it no longer has any value because no one else can operate it. When the operator is present, the value of the computer certainly exceeds the net worth of its ingredients. Without an operator, however, a computer has no useful function, and is worth no more than the scrap value a junk dealer will pay for its component bits of plastic and metal.
Jagad Guru Speaks

The teachings left by the founder- acaryas of the sampradayas are to be especially honored. Sri Ramanuja, Sri Madhavacarya, Sri Nimbarkacarya, and Sri Visnuswami are the four original acaryas of the four Vaisnava lines. One should accept only their teachings and conclusions and not others. One should receive spiritual initiation in one of these four sampradayas and not others.

"A devotee must understand that the adi-guru, original spiritual master of the sampradaya, is the siksa-guru, and only his teachings are to be accepted and not those of any other scholar or teacher. And only a saintly devotee who has understood the teachings of the siksa-guru is eligible to be a diksa-guru for others. If one thinks that he can be initiated by a mayavadi guru into the teachings of Krsna consciousness, he errs severely. He will not attain pure devotion.