Sincerity & Seriousness
If you are sincere and very serious about understanding the meaning of life then the Lord will arrange to send someone so that you can get that knowledge.
Instructions of the Spiritual Master
The spiritual master can instruct the disciple though many different formats.
Prayers of the Spiritual Master
When the teacher, the spiritual master, is praying for the mercy of the Lord to enlighten the student, then by the blessings of the Lord the student gets the blessing of knowledge.
Prayer
We should pray that we become a sincere and bonafide student.