2. Dissonances:
m2, M2, m7, M7, sometimes P4
all augmented and diminished intervals
3. The P4 is considered a consonance only if it is not with the lowest (or bass) voice. In other words, the P4 is dissonant in two voices, and in three or more voices must occur between two of the upper voices to be considered consonant.
The way of the cross needs sacrifice.
Jesus Christ is the Lord. :)