Friar Lawrence’s speech : These violent delights have violent ends and in their triumph
Die,like fire and powder ,Which consume :the sweetest honey is loathsome in his own
Deliciousness and in the taste confounds the appetite :Therefore love moderately ; long love doth so ; Too swift arrives as tardy as too slow.

The Verdict : This means that the friar meant to say a little bit of a good thing is fair but too much of a good thing is bad because if you try honey it is sweet but if you have a lot it is too much and does not taste nice.
They both will have a violent end like fire and powder,which as they kiss consume;
When you throw powder into a fire it just makes a bigger flame.For instance Romeo is Fire and Juliet is powder so when they meet it goes Boom.