The four methods of transmission have been mentioned in the following passage:-
These are (1) through touch,(2) through the spoken word, (3) through sight and (4) through thought, and are classed as the gross, the subtle, the subtler and the subtlest respectively :-

These are transmission (1) through touch,(2) through the spoken word, (3) through sight and (4) through thought, and are classed as the gross, the subtle, the subtler and the subtlest respectively.

These verses describe three of the methods of initiation, the “Sparsha-Diksha” (initiation by touch) resembling the action of a bird which nourishes its babes by keeping them under its wings, the “Drig-Diksha” (initiation by sight) resembling the action ones simply by keeping an eye over them and the “Vedha-Diksha”(Initiation by concentration of the will) resembling the action of fish which nourishes its infants by concentrating its will onthem. There is no mention here of “ Shabda-Diksha” (initiation by word) which can be of two kinds, initiating the disciple by chanting a Mantra or by blessing him by a word of mouth and thus infusing yogic power in him.

The following verse describes the marks which indicate that the power has been transmitted to a disciple.

“The marks of transmission are – falling of the body, tremor, ecstatic delight, perspiration and thrill.”