Is it more important to seek what is good, or what is true? What is good can only be good is it really, truly is good, and so it seems that truth is preeminent. But don't we seek the truth because we feel that we ought to do so?
We can imagine situations in which the two can come apart, at least existentially (that is, within the way we live our finite lives on a daily basis) even if not in the end. I'm not simply talking about cases where we would have to kill innocents or sell our souls in order to come by some all-encompassing knowledge; it could be the pursuit of studies instead of helping at the soup-kitchen.
So, we have four cases, given that he two do seem interconnected somehow: (1) goodness is dependent on truth, (2) truth is dependent on goodness, (3) both or dependent on some third thing, and (4) the two are mutually dependent in some way.
If (1) is the case, then contemplation and study should consume most of our time; it is no use acting without knowing what is true first. This view has some plausibility in that virtues without wisdom can often be harmful. Courage, for example, even with the best intentions, can produce a monster if it is not guided by a knowledge of its proper use.
If (2) is the case, then we should primarily be acting in the world. It does seem that the person spending all of her time in study is missing the point, and is less of a human being than the one who is out there enacting justice (although this of course betrays my non-classical aesthetic sensibilities). If so, then it is plausible that the truth comes second to enacting good.
If (3) is the case, then we have a way of reconciling the two above options: neither the true nor the good completely trump each other, but rather are both connected to some third source. But, what is this third thing? "Being," whatever that may be? So, this option cannot help us without further elucidation. It's been done in various ways at various times, but that's another topic.
If (4) is the case, then we can avoid some mysterious common source and avoid subordinating one to the other. However, in what way is (4) true? Is there one abstract object one time referred to as the truth and at another time as goodness? But how does this make sense out of our existential conflicts? Another option is a division of labor: for some it is good to give preeminence to truth, and to others a preeminence to goodness. Society overall will be balanced, though individuals may not be (or, individuals themselves may overall be balanced through giving different priorities at different times).