Vaishnava Samhita: Ramananda Samvadam. Vol II Book 4 Chp 8 Shloka 47
ध्यानयोगात्तथा कृष्णे भक्तियोगो विशिष्यते |
तत्रापि गोकुलेन्द्रस्य णामकीर्तनमुत्तमम् ||
Dhyaana Yogaat Tathaa Krishne Bhaktiyogo Vishishyate
Tatraapi Gokulendrasya Naama Keertanam Uttamam
The path of loving devotion to Shri Krishna, or the Bhakti-Yoga is on a plane higher than Dhyana Yoga or meditation. Among the various dimensions of Bhakti-Yoga, the chanting of the Divine Names of Shri Gopala is the best.
Please check these: Excerpts from a discourse by our Sri Sri Muralidhara Swamiji
God gives whatever is required (by His devotee), removes whatever is not needed, leads the devotee in the path suited to him/her; Since Bhagavãn takes utmost interest in the devotee's needs the latter will not earn/attain any 'siddhi'