Regarding the necessity of the help of a Guru to deep yoga practice, he said:
It is absolutely necessary for all devotees to totally surrender to their Guru. The more one can surrender to the Guru, the more he can ascertain the subtlest of the subtle techniques of yoga from his Guru. Without surrender, nothing can be derived from the Guru.
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"If one had to travel to a distant place for a few days, some requisites would be necessary. In this instance, the traveller is conversant about the place and period of stay. Yet without the prescribed requisites, travel is impossible. But when this body is abandoned and you have to proceed to an unknown path for an indefinite period of time, then how many requisites would be necessary? No material objects will be required then. The destination and duration of stay is unknown. That requisite has to be acquired in this present life through yogasadhana and carried over and that sadhana-derived experience will be the only requisite in the form of reformation. This requisite is imperishable." 
Regarding Kriya Yoga, he said:
Always remember that you belong to no one, and no one belongs to you. Reflect that some day you will suddenly have to leave everything in this world–so make the acquaintanceship of God now. Prepare yourself for the coming astral journey of death by daily riding in the balloon of God-perception. Through delusion you are perceiving yourself as a bundle of flesh and bones, which at best is a nest of troubles. Meditate unceasingly, that you may quickly behold yourself as the Infinite Essence, free from every form of misery. Cease being a prisoner of the body; using the secret key of Kriya, learn to escape into Spirit
~Yogiraj Sri Shyamacharan Lahiree ~🙏🌻
Regarding Kriya Yoga, he said: