Both parts of the proverb are about speech. Of course, only valuable things are gathered and stored.
When I was in the services, still a teenager, and posted away at a particular place, there was a middle aged Christian couple who used to be very hospitable. They would take believers off the base, and look after them at their home. Well, there was one evening and quite a group of us were round at the house of this couple, and unfortunately the husband met with an accident. It turned out not to be a very serious accident, but nobody knew at the time. There was a telephone call from someone to say he would not be making it; he had been taken off to hospital. Now the poor lady was a good earnest believer, but she was obviously under considerable strain over a number of things in her life, and to the astonishment of all of us, she went completely to pieces. She threw, really, quite a fit, and as youngsters we were all, dumbfounded, and did not know what to say. This was totally shocking, and yet of course, we were sympathetic, so we stood there completely nonplussed. Then one person in our midst suddenly took the whole situation in hand, and the rest of us just gaped. He seemed to know exactly what to say, and I think he was the youngest of us, as it happened. He knew just how to pour oil on troubled waters; he knew just the right words. We were staggered, and of course, we looked to this chap with amazing respect. But of course, as it became apparent from his own words to us later on, it was because he had had an example. He had seen this happen in his own circumstances, several times over. He had seen how some other mature believer handled such a situation, and he knew what kind of words to say, what kind of approach to use.