当初郭斌上景室山之时，华佗问了郭斌受伤的缘由后，曾与郭斌有过这么一段对话。
“玄龙枪乃天下之至宝，亦是天下之至毒。即便是你师父童雄付之能，三十岁前亦难以灵活使用，你这小子，却真是好大的胆子。”一番话，说得郭斌嘿嘿直笑。
“你师父可曾告诉过你，这玄龙枪你现在还使不得？”
郭斌道：“当初家师将玄龙枪传于晚辈之时，确曾说过，待过两年晚辈身体长成之时方可放心使用。”
华佗点点头，道：“玄龙枪为玉真子前辈以天外陨石熔炼所铸，弹性上佳，坚韧异常，是难得一见的神兵宝器，只是若能力未足便贸然使用，必会伤及自身。”
郭斌道：“敢问前辈，究竟要何种能力呢？”
华佗道：“这就要从长兵器的利弊说起了。”
顿了顿，继续道：“凡是粗重的兵器，与人对阵之时，自然是威猛绝伦，较之短小灵活的兵刃实在是大占上风。不过也有一个极大的劣势，那便是粗大兵器容易漏出破绽，空门也大。临敌对战之时，一旦失误，空门大露，回手防御不及，便易被人一鼓而破。”
一番话，将郭斌说得大点其头。
华佗笑笑道：“要使得动这玄龙枪，双臂若是没有个千斤的力气是办不到的。想必潜阳是天生神力，方可以单凭蛮力便能使得动，否则童雄付亦不会将玄龙枪传授给你。”
郭斌不好意思地挠了挠头。
华佗继续道：“百鸟朝凤枪法集长兵器用法之大成，既有硬杆兵器的威猛，亦带有棍法的灵动，端得是刚柔并济的好枪法。若以玄龙枪使用起来，必可刚柔兼济，既可用于战场，亦可以之江湖拼杀。”
“只是，逾是粗重的兵器，其反震之力必然亦是逾大，玄龙枪尤甚。枪身的弹抖固然可以使枪法愈加灵动，亦可借之卸去一部分力，使用之人却需要有高深的内家功夫方可驾驭得住。若是不懂的卸力化力的方法，便会伤及脏腑。令师可曾教你卸力化力的法门？”华佗道。
郭斌摇摇头，道：“家师只传授了晚辈一套呼吸吐纳的法门，却多是在战斗中，于掌握节奏所用，其中并未记载如何卸力化力。”
华佗点点头，道：“内家功夫，需要循序渐进，我观你虽受重伤，却生机不绝，想必便是这套呼吸吐纳功夫的作用。只是不知为何，令师似乎并未得传玉真子前辈玄门正宗的道家内功，方未将卸力化力之法传授给你。若依你目前的进境，以这套呼吸吐纳的功夫再练个一年半载，便勉强能使用得了玄龙枪了。”
“令师因受玄龙枪启发，曾打造了一杆亮银枪。这杆枪的特性，几与玄龙枪相同：非但弹性上佳，锋锐无筹，重量上亦较木枪为重，较玄龙枪为轻，较为适中，总不至于震伤使枪之人。若以之使出百鸟朝凤枪法，则又是一番光景了。”
郭斌道：“不瞒前辈，这杆亮银枪，晚辈亦曾见过，家师已将之传给鄙师兄，确然是威猛霸气中带着狠辣凌厉。”
华佗点点头，道：“如此，我便将五禽戏中的鹤戏传授与你，并将以鹤戏为根基的卸力化力之法，一并授与你。这样，只需旬月，你伤势即可大体痊愈，待你伤势痊可，再使用玄龙枪就百无禁忌了。”
郭斌忙躬身下拜，却给华佗一把搀住，并以一股巧劲将他托起，回复原来站立的姿势。一切恰到好处，不多一分亦不少一分。
华佗道：“潜阳不必如此，你既已拜入童雄付门下，我便不可横刀夺爱，贸然收你为徒。我虽传授你五禽戏，却是为了给你疗伤，因此你我二人并无师徒之名。你可记下了？”
郭斌道：“多谢前辈大恩，晚辈记下了。”
华佗将鹤戏的练法与窍要说与郭斌后，道：“所谓卸力化力之法，其实是内家拳中身体骨骼关节运动之法。适才我将内家拳用力之法传授与你，如何将脚上的力道通过骨骼的蠕动与身体的运动传到手上，只要将其反过来用，便可将手上受到的反震之力传到脚底。要切记，人的身体便似一个大弹簧，有多少力进来，就有多少力弹出去，使力与卸力皆是如此，只是使用的方向相反而已。只要悟出了这一点，你的内家功夫便算是入门了。”
“使用玄龙枪时，要切记以腰为轴，每一次与敌方兵刃相交，都要将力卸在脚底，找准攻击的时机，再如弹簧一般将其弹出去，这样，便借上了对方的力。如此，防御便是进攻，进攻亦即防御，你的每一次攻击，都是己身与对方合力所发，自然可以以弱胜强。不过，天下间在力道上能强得过你之人，恐怕不多了。”华佗指点道。
内家功夫的使力方式，是通过关节一层层的运动，将力量由下而上传递的，而卸力亦是通过关节的运动，将手上传来的力量引导到脚底，这样或者是纯粹卸力，或者是借力打力，就全看当时的战场环境了。
得益于穿越而形成的高超的悟性（也就是领悟力了），郭斌很快将内家拳借力打力的方法学会，所欠缺的只是火候与熟悉程度而已了。也因此，在张梁围攻袁绍之时，郭斌可以用玄龙枪打得热火朝天。
其实，当时郭斌是占了很大的便宜的。因为玄龙枪自重大，挥舞起来惯性就更强，若是借了马力的冲击，在冲阵之时自然是无往而不利，所以郭斌先前冲阵时能够如下山猛虎般全无一合之敌，很大程度上是占了兵器的便宜。若是太平道众人皆是训练有素的士兵，手中所拿不再是各类杂乱不一的兵器，而换成是长枪重戟，那么郭斌很可能会被穿成糖葫芦，他脑子秀逗了才会那么冲阵。
而在与张梁的拼斗中，郭斌方才有机会用上华佗所授的内家功夫。全身以腰为轴，挥动起玄龙枪来纵横捭阖，锋锐凌厉，威风霸气。这也是郭斌首次毫无挂碍地畅快淋漓地全力施展，亦是他首次可以如此百无禁忌地使用玄龙枪。
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