Yes, life will be peaceful when we trust our mind, relaxing and basking in it. Loosen the reins—in fact, drop them. After all, it's our very own mind, near and dear, worshipable and adorable. So my mind tells me.
Material existence, the Bhagavatam teaches, is a drama that happens through the mind. Fabricating superficial stuff known as happiness and distress, the mind drags us into one existential absorption after another, swinging us from body to body.
As Krishna explains in the Gita, higher than the mind is the intelligence, and higher still is the soul. Bhakti-yoga means to use the mind to think of Krishna and His service (the same) and to supervise the mind with its immediate superior——deliberative intelligence. Then gradually our real self the soul becomes uncovered, and as we become more advanced, the Supersoul begins to personally educate us.
On our way to Krishna, Sukadeva Goswami gives some crucial advice to bhakti practitioners:
"After capturing animals, a cunning hunter does not put faith in them, for they might run away. Similarly, those who are advanced in spiritual life do not put faith in the mind. Indeed, they always remain vigilant and watch the mind's action.
"All the learned scholars have given their opinion. The mind is by nature very restless, and one should not make friends with it. If we place full confidence in the mind, it may cheat us at any moment." (S. bhag 5.6.2-3)
Let's protest.
Isn't this warning mainly for new devotees, "new believers"? I've been around for a while now—time to just "let it be."
Give me a break, after all these years, I've internalized all the spiritual practices, so I don't have to be regular anymore. I just want to be a good human being, who does mostly as everyone does while believing, of course, in God, Krishna.
Foolish devotee, listen to Visvanath Cakravarti Thakur detail how the mind, like a chameleon, constantly assumes a new condition. One moment it flickers pure, the next, impure.
A cunning cheater shows friendship to trusting persons; then robs and kills them. Similarly the mind of the conditioned soul sometimes demonstrates its potential purity, shaking free of lust and anger, submitting to devotional activities. Eventually, one unsuspecting day, after the devotee has slackened and eased, suddenly the material mind storms back, betraying us, as we drown in a tsunami of material pollutants. Down goes the bhakti practioner.
Cakravartipada further enunciates how when long-term yogis maintain an ongoing faith in the mind, such trust and confidence will eventually reveal itself to have drained away their accumulated potencies, corroding their austerities. In time, the escalating ugly truth pounces, catching them completely off-guard.
Sukadeva Goswami (5.6.4-5) continues his crucial instruction:
"An unchaste woman is very easily carried away by paramours, and it sometimes happens that her husband is violently killed by her paramours. If the yogi gives his mind a chance and does not restrain it, his mind will give facility to enemies like lust, anger and greed, and they will doubtlessly kill the yogi.
"The mind is the root cause of lust, anger, pride, greed, lamentation, illusion and fear. Combined, these constitute bondage to fruitive activity. What learned man would put faith in the mind?"
We shall ignore this essential advice at our own peril.