Alma 32:33

And now behold, because ye have tried the experiment, and planted the seed, and it swelleth, and sprouteth, and beginneth to grow, ye must needs know that the seed is good.

Because you have tried it out and planted the seed, and it grows bigger and starts to grow, you must know that the seed is good.

“Now, because you’ve tried the experiment, planted the seed, and it’s swelling and sprouting and beginning to grow—you know the seed is good.”