The highest truth is to give Krishna consciousness. Yet, to follow both instructions at the time they were given is to follow the same truth. We may join our guru's formal mission on the strength of Krishna's flute call, sarva-dharman parityajya mam ekam saranam vraja. Later, as in the case of Srila Prabhupada, who left the Gaudiya Math, we may, in the spirit of Krishna's flute call, have to leave the formal mission, if in our guru's absence it has become devoid of his spirit. When apparent contradictions are not resolved by the advancing devotee, they give rise to real contradictions.
Real contradictions deviate one from the pure devotional conclusions.
These real contradictions are based on anarthas and they must be transcended. They are most typically found in the kanishtha-adhikari. As between day and night there is the sandhyam at dawn, midday, and dusk, so these divisions of Vaishavas are not black ad white. We must look for the gray in everything. In computer technology, there are 256 shades of gray between black and white.